authoritarian system. saleena wang, cnn, tokyo. and south africa, a top scientific expert says the country has past the peak of its omicron outbreak. you can see on the map when we bring that up, south africa is one of the few countries on the continent where cases are down compared to last week. they have fallening more than 20%. the head of the south african medical association says this fourth wave was steeper but much shorter than previous waves. hospital admissions and deaths have also been significantly lower. so for more on that encouraging statement, we re joined now from nairobi, kenya. good to see you, larry. many are taking comfort from this information. do experts there know why infections are suddenly falling? rosemary, the experts think this is because of two factors. one is that more people in the population have been infected.